Sonic hedgehog opposes epithelial cell cycle arrest.
Sonic hedgehog opposes epithelial cell cycle arrest.
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DOI:
10.1083/jcb.147.1.71
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发表时间:
1999-10-04
期刊:
影响因子:
--
通讯作者:
Khavari PA
中科院分区:
文献类型:
--
作者:
Fan H;Khavari PA
Stratified epithelium displays an equilibrium between proliferation and cell cycle arrest, a balance that is disrupted in basal cell carcinoma (BCC). Sonic hedgehog (Shh) pathway activation appears sufficient to induce BCC, however, the way it does so is unknown. Shh-induced epidermal hyperplasia is accompanied by continued cell proliferation in normally growth arrested suprabasal cells in vivo. Shh-expressing cells fail to exit S and G2/M phases in response to calcium-induced differentiation and also resist exhaustion of replicative growth capacity. In addition, Shh blocks p21CIP1/WAF1-induced growth arrest. These data indicate that Shh promotes neoplasia by opposing normal stimuli for epithelial cell cycle arrest.
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